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In the SIms 3, my household has another them running in the town. My child Sim befriend herself when they're in school. They've been around since the beginning of the game. And oddly, they come often to my house. This gives me the creeps. Other players have the same problem too. The mod can copy the family to the Library and put into the town. This happens if the game has the World Adventures, Late Night, or some certain EP. ThePeculiarMe|(talk to me) 13:51, April 19, 2014
Are you sure it's caused by a mod? I've heard that the game tends to import Sims from the library (either family bin or CAS Sim bin) to the town, making it possible to have impostors in the town, but I don't really know the details. I might've even heard it wrong. NikelTalk–Vote! 13:57, April 19, 2014 (UTC)
Yes, I'm sure. Well, if you have many mods. Plus, it can be fixed by removing all of them, or delete the family from the Library, and re-installing the game. I found this from The Sims 3 forum. ThePeculiarMe|(talk to me) 15:03, April 19, 2014